摘要
[目的]为准好氧填埋垃圾渗滤液的处理提供理论依据。[方法]采用循环式准好氧填埋结构,研究青藏高原地区生活垃圾准好氧填埋单元的重金属(Cd、Pb、Ni、Cr、Hg)变化特性。[结果]整个试验过程中渗滤液pH值保持在7.0以上。渗滤液中的有机污染物通过渗滤液回灌在较大程度上得到了降解和去除。准好氧填埋单元的渗滤液中的重金属浓度受渗滤液pH值、难溶金属化合物的溶度积常数、腐殖酸浓度等因素的影响。除了Hg一直呈下降趋势外,Cd、Pb、Ni、Cr出现了不同程度的升降变化。随着垃圾的开始降解,渗滤液中的重金属浓度增加。[结论]Cd、Ni和Pb在经过450 d的准好氧填埋后能够达到国家污水综合排放标准对一类污染物的浓度要求。
[Objective] The aim was to provide the theoretical basis for the leachate treatment of Semi-aerobic landfill.[Method] Heavy metal（Cd,Pb,Ni,Cr and Hg） variation characteristics of domestic waste from Tibetan plateau area in semi-aerobic landfill unit were studied by circulating type semi-aerobic landfill structure.[Result] The pH value of leachate kept above 7.0 in the whole experimental process.The organic pollutants in the leachate were degraded and eliminated by the means of leachate recirculation to a large extent.The concn.of heavy metal in the leachate of semi-aerobic landfill unit was effected by some factors such as leachate pH value,solubility product constant of slightly soluble metal compounds and humic acid concn.Cd,Pb,Ni and Cr exhibited the fluctuation change to different degree except Hg which showed the downtrend all the time.The concn.of heavy metal in the leachate was increased with the degradation of garbage.[Conclusion] Cd,Ni and Pb in semi-aerobic landfill treated after 450 days could reach the concn.requirement of national sewage comprehensive emission standard to the first kind of pollutants.
出处
《安徽农业科学》
CAS
北大核心
2008年第27期11988-11990,12031,共4页
Journal of Anhui Agricultural Sciences
关键词
青藏高原
准好氧填埋
重金属
变化特性
Tibetan plateau
Semi-aerobic landfill
Heavy metal
Variation characteristics
作者简介
杨巧艳（1970-），女，陕西泾阳人，在读博士，副教授，从事固体废物处理处置技术研究。
